package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!= null && flavors.size()>0){
            //遍历flavors集合，插入DishId的值
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入多条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page);
    }
    /**
     * 菜品的批量删除
     * @param ids
     */

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //当前菜品是否能够删除，起售中
      /*  for (long id:ids){
            Dish dish  = dishMapper.getById(id);
            if (dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }*/
        //优化，查询当前菜品是否在起售中
        Integer dishNum = dishMapper.countById(ids);
        if (dishNum>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }

        //判断当前菜品是否被套餐关联
        List<Long> setmealIds =  setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds!= null && setmealIds.size()>0){
            //当前菜品被套餐关联了不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的菜品数据
       /* for (Long id : ids) {
            dishMapper.deleteById(id);
            //删除关联的口味数据
            dishFlavorMapper.deleteByDishId(id);

        }*/
        //优化，根据菜品ID批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //优化，根据菜品ID 批量删除口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }
    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品表，根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //查询口味表，根据id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //封装到VO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据id来修改菜品基本信息和对应的口味信息
     * @param dishDTO
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //修改口味表（可能新增，更新和删除---技术层面简化为先删除再插入数据）
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!= null && flavors.size()>0){
            //遍历flavors集合，插入DishId的值
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入多条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    /**
     * 起售停售菜品
     * @param status
     * @param id
     */
    @Override
    public void startOrFail(Integer status, long id) {
        Dish dish=Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
